Knowing which CCTV Camera to use for which application can be tricky. The majority of our cameras (not including the NPR cameras) can be used in most common scenarios. We would recommend fixed lens cameras as standard as you do not need to adjust the zoom and focus of these. If you do want to adjust the zoom and focus of a camera we would recommend the autofocus cameras as these cameras will automatically focus if installed on an SPRO system, you can even adjust the zoom and focus from your mobile phone. All of the external cameras we sell have IR built-in as standard so they will work with no light with differing ranges in IR distance depending on the camera model.